Add and, if possible, simplify.
+ 
A. 
B. 
C. 
D. 
Answer: D
Mathematics
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If r(t) is the position vector of a particle in the plane at time t, find the indicated vector.Find the velocity vector.r(t) = (-5t2 + 12)i + 
j
A. v = (-10t)i - 
j
B. v = (-10)i + 
j
C. v = (-10t)i + 
j
D. v = 
i + (-10t)j
Mathematics
Evaluate the integral.
dx
A. 2 B. -2 C. 6 D. 4
Mathematics
Use a calculator to find the approximate value of the expression rounded to two decimal places.cot 0.1859
A. 1.02 B. 5.32 C. 0.19 D. 0.98
Mathematics
Factor completely using the trial and error method to factor trinomials. If unfactorable, indicate that the polynomial is prime.7x2 + 78x + 11
A. (7x + 1)(x + 11) B. (7x - 1)(x - 11) C. (7x + 11)(x + 1) D. prime
Mathematics